disable Bitbucket perm sync test

Created by: burmudar

test is broken on main - timing out See builds:

• https://buildkite.com/sourcegraph/sourcegraph/builds/162722#018226e1-881e-4777-b4dc-8dcf5215a644
• https://buildkite.com/sourcegraph/sourcegraph/builds/162711#018226aa-3eab-4a76-9138-c7689e3c3403

Test plan

none - disabling test